https://github.com/Username/Repository/tree/master/subdirectory | v svn checkout https://github.com/Username/Repository/trunk/subdirectory
References :
Cloning only a subdirectory with git - Stack Overflow
https://github.com/Username/Repository/tree/master/subdirectory | v svn checkout https://github.com/Username/Repository/trunk/subdirectory
github = OAuth2Service(name='github',
authorize_url='https://github.com/login/oauth/authorize',
access_token_url='https://github.com/login/oauth/access_token',
client_id=CLIENT_ID,
client_secret=CLIENT_SECRET,
base_url='https://api.github.com/',
)